PowerShell script to download major browser WebDriver drivers for Selenium.

download-selenium-drivers.ps1

[Net.ServicePointManager]::SecurityProtocol = "Ssl3, Tls, Tls11, Tls12";

$currentDir = (Get-Item -Path "./").FullName;
$driversDirName = Join-Path $currentDir ".drivers";
$isWindows = [System.Boolean](Get-CimInstance -ClassName Win32_OperatingSystem -ErrorAction SilentlyContinue);
$webClient = New-Object System.Net.WebClient;

function Ensure-Driver-Exists($browserName, $exeName, $download, $zipName) {
    $localExeName = Join-Path $driversDirName $exeName;
    if (Test-Path $localExeName) {
        Write-Host "${browserName}: driver already located at $localExeName." -f DarkGray;
        return;
    }

    if ($zipName -eq $null) {
        $localDownloadLocation = Join-Path $driversDirName $exeName;
    } else {
        $download = "$download/$zipName";
        $localDownloadLocation = Join-Path $driversDirName $zipName;
    }

    Write-Host "${browserName}: downloading driver from $download..." -f DarkGray;
    $webClient.downloadFile($download, $localDownloadLocation);

    if (!($zipName -eq $null)) {
        Write-Host "${browserName}: extracting driver from $localDownloadLocation..." -f DarkGray;
        Expand-Archive -DestinationPath $driversDirName -Path $localDownloadLocation;
        Remove-Item $localDownloadLocation;
    }

    Write-Host "${browserName}: driver placed in $localExeName." -f DarkGray;
}

function Ensure-Chrome-Driver() {
    Ensure-Driver-Exists "Chrome" "chromedriver.exe" "http://chromedriver.storage.googleapis.com/2.38" "chromedriver_win32.zip"
}

function Ensure-Gecko-Driver() {
    Ensure-Driver-Exists "Gecko (Firefox)" "geckodriver.exe" "https://github.com/mozilla/geckodriver/releases/download/v0.20.1" "geckodriver-v0.20.1-win64.zip";
}

function Ensure-Edge-Driver() {
    if ($isWindows) {
        Ensure-Driver-Exists "Edge" "MicrosoftWebDriver.exe" "https://download.microsoft.com/download/F/8/A/F8AF50AB-3C3A-4BC4-8773-DC27B32988DD/MicrosoftWebDriver.exe"
    }
}

function Ensure-Internet-Explorer-Driver() {
    if ($isWindows) {
        Ensure-Driver-Exists "Internet Explorer" "IEDriverServer.exe" "http://selenium-release.storage.googleapis.com/3.9" "IEDriverServer_Win32_3.9.0.zip"
    }
}

New-Item -Force -ItemType directory -Path $driversDirName > $null;

Ensure-Chrome-Driver;
Ensure-Gecko-Driver;
Ensure-Edge-Driver;
Ensure-Internet-Explorer-Driver;